公开(公告)号：US20240281951A1

公开(公告)日：2024-08-22

申请号：US18651195

申请日：2024-04-30

Applicant: Apple Inc.

Inventor： Christopher A. Burns ,  Casper R. W. van Benthem

IPC: G06T7/00 ,  G06T1/20 ,  G06T15/00 ,  G06T15/06 ,  G06T17/10

CPC classification number: G06T7/0002 ,  G06T1/20 ,  G06T15/005 ,  G06T15/06 ,  G06T17/10 ,  G06T2207/20224

Abstract: Techniques are disclosed relating to testing whether a ray intersects a graphics primitive, e.g., for ray tracing. In some embodiments, intersection circuitry performs a reduced-precision conservative intersection test and shader circuitry performs an original-precision intersection test if the intersection circuitry indicates a hit. The intersection circuitry may quantize the ray (and may quantize the primitive or may receive a quantized representation of the primitive). The intersection circuitry then determines an intersection result for the reduced-precision test based on the quantized primitive data and quantized ray data. In various embodiments, disclosed techniques may improve performance or reduce power consumption by reducing the number of original-precision intersection tests that do not result in hits.

公开(公告)号：US20220207690A1

公开(公告)日：2022-06-30

申请号：US17136542

申请日：2020-12-29

Applicant: Apple Inc.

Inventor： Christopher A. Burns ,  Casper R. W. van Benthem

IPC: G06T7/00 ,  G06T15/06 ,  G06T15/00 ,  G06T17/10 ,  G06T1/20

Abstract: Techniques are disclosed relating to testing whether a ray intersects a graphics primitive, e.g., for ray tracing. In some embodiments, intersection circuitry performs a reduced-precision conservative intersection test and shader circuitry performs an original-precision intersection test if the intersection circuitry indicates a hit. The intersection circuitry may quantize the ray (and may quantize the primitive or may receive a quantized representation of the primitive) and generates a potential error value based on propagation of quantization error for the primitive and ray. The intersection circuitry then determines an intersection result for the reduced-precision test based on the quantized primitive data and the potential error. In various embodiments, disclosed techniques may improve performance or reduce power consumption by reducing the number of original-precision intersection tests that do not result in hits.

公开(公告)号：US12002190B2

公开(公告)日：2024-06-04

申请号：US17136542

申请日：2020-12-29

Applicant: Apple Inc.

Inventor： Christopher A. Burns ,  Casper R. W. van Benthem

IPC: G06T15/06 ,  G06T1/20 ,  G06T7/00 ,  G06T15/00 ,  G06T17/10

CPC classification number: G06T7/0002 ,  G06T1/20 ,  G06T15/005 ,  G06T15/06 ,  G06T17/10 ,  G06T2207/20224

Abstract: Techniques are disclosed relating to testing whether a ray intersects a graphics primitive, e.g., for ray tracing. In some embodiments, intersection circuitry performs a reduced-precision conservative intersection test and shader circuitry performs an original-precision intersection test if the intersection circuitry indicates a hit. The intersection circuitry may quantize the ray (and may quantize the primitive or may receive a quantized representation of the primitive) and generates a potential error value based on propagation of quantization error for the primitive and ray. The intersection circuitry then determines an intersection result for the reduced-precision test based on the quantized primitive data and the potential error. In various embodiments, disclosed techniques may improve performance or reduce power consumption by reducing the number of original-precision intersection tests that do not result in hits.